Core-bar.



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(Application led July 12, 1900.)

(No Model.)

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GEORGE H. ADAM, OF HOME CITY, OHIO.

CORE-BAR.

SPECIFICATION forming' part of Letters Patent No. 668,474, dated February 19, 1901.

Application iiled July l2, 1900.

To all wwn/t t pta/y concern:

Be it known that I, GEORGE H. ADAM, a citizen of the United States, and a resident of Home City, in the county of Hamilton and State of Ohio7 have made a certain new and useful Invention in OoreBars; and I declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it appertains to make and use the invention, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

Figure l is a central longitudinal section of the invention with parts expanded. Fig. 2 is a similar view with parts contracted. Fig. 3 is a section on the line 3 3, Fig. l. Fig. a is a section on the line 4 t, Fig. 2. Fig. 5 illustrates the lock K in detail.

The invention relates to core-bars; and it consists in the novel construction and combinations of devices, as hereinafter set forth.

The object of the invention is to provide an improved expanding and contracting core-bar adapted to be operated by longitudinal movement of the draw-bar spindle, so that when the core is drawn by means of said spindle it will automatically contract.

In the accompanying drawings the letter A designates the longitudinal sections or staves of the core-bar, which are respectively provided with interior lapping flanges a to close the longitudinal intervals at b when the corebar is expanded. These lapping ilanges are formed by marginal depressions of alternate sections A, engaged by the marginal portions of the remaining sections to form an uninterrupted peripheral surface'of the core-bar when contracted and when expanded to form a peripheral surface interrupted by narrow closed depressions orlongitudinal intervals b. These staves or sections are provided with iuterior lugs O at each end, having inclined slots or guideways c to receive the 'roller d of the radial arms D, which are carried by collars E', secured to the operating-rod or draw-bar spindle E. These lugs extend lengthwise of the core-bar, and the slots or guideways are inclined inward and toward the seat end g of the core-bar. The rollers d are pivoted to the cross-heads by means ot' short bolts e.

Between the end lugs O may be provided Serial No. 23,353. (No model.)

intermediate lugs F, having inclined ways f for the rollers of intermediate arms D. On the staves or sections are also provided interior stop-lugs I-I H, and interior lockinglugs L L are formed at the drawing end of the core-bar to engage the wedge-arms la 7c of the revolving lock K, which is pivoted on the draw-bar spindle near its end.

The stoplugs H H engage the arms D when the core-bar is being Withdrawn, and thus serve to protect the rollers and their bearings from strain.

The exterior' surfaces of the staves or sections are perforated and roughened in the ordinary manner to receive the loaming or covering.

In expanding the core-bar the draw-bar spindle is depressed or pushed inward and the inclined slots and planes of the staves or sections are pushed outward by the rollers of the arms of said spindle. At the same time the lock Kenters the mouth of the corebar, its wedge-arms passing between the locking-lugs L L. When the core-bar is fully expanded, it is secured in this form by turning the lock K on the spindle in such manner that its wedge-arms 7n k engage the locking-lugs.

In the core-bar illustrated in 'the drawings the arms D have a parallel or branched construction in order that the rollers can be located between parallel walls or branches, which also serve to embrace the lugs of the staves or sections. In this manner a very strong construction is provided for, as the staves and crossheads are securely and yet movably connected.

When in expanded form, the core-bar is ready for loaming.

After use in casting the lock K is turned to release the parts, and then by simply making tension on the draw-bar spindle by means of a drag-hook through its ringz orotherwise the staves will automatically draw away from the loam, being actuated by the inclined slots of their lugs to take the contracted position.

The slots and bearing-lugs of the staves or sections are provided with inner short extensions c f at their ends, which are parallel to the axis of the core-bar, in order that when the 'staves are in expanded position they will be set in such position, and thereby the liability of the core-bar sections being forced IOO together' by the shrinking ofthe casting is avoided. This construction also forms a brace to the core-bar Which aids in relieving the revolving lock of much of the shrinking strain which would otherwise come upon it in the casting.

Having described this invention, what I claim, and desire to secure by Letters Paten t,

1. Aoore-bar consisting of longitudinal seotions, all of said sections having interior lugs provided with cam-slots of the same shape, all of said slots having a short inner extension parallel to the aXis of the core-bar, a central operating-rod, having forked radial arms ernbraeing said lugs and carrying rollers Working in said slots, whereby the core-bar seotions have each an equal movement in eX- pansion and contraction of the core-bar, and

are set when expanded., together with independent means for locking said sections eX- panded, substantially as specified.

2. A Core-bar, oonsistin g of longitudinal sections having interior lugs provided with camslots, said slots having inner extensions parallel to the axis of the core-bar, a central operating-rod having radial arms, rollers carried by said arms, and working in said slots, locking-lugs forming a part of said sections, and a revoluble locking-disk engaging said lugs to keep the core-bar expanded, substantially as specified.

In testimony whereof I affix my signature -in presence of two Witnesses.

GEORGE H. ADAM.

Witnesses:

ARTHUR B. MATsoN, RALPH W. MATsoN. 

